tert-Butyl N-(benzyloxycarbonyl)-2(RS)-allylpipecolate | 129605-87-4

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: tert-Butyl N-(benzyloxycarbonyl)-2(RS)-allylpipecolate
• 英文别名: 1-O-benzyl 2-O-tert-butyl 2-prop-2-enylpiperidine-1,2-dicarboxylate
• CAS: 129605-87-4
• 化学式: C₂₁H₂₉NO₄
• 分子量: 359.466
• InChiKey: LVVULANMLPFGMX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.3
• 重原子数：
  26
• 可旋转键数：
  8
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.52
• 拓扑面积：
  55.8
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  tert-Butyl N-(benzyloxycarbonyl)-2(RS)-allylpipecolate 在 5% Pd on active carbon 重铬酸吡啶 、 dimethyl sulfide borane 、 叠氮磷酸二苯酯 、 氢气 、 三乙胺 、 三氟乙酸 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 、 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 50.0h， 生成 八氢吲嗪
  参考文献：
  名称：

  α-叔氨基酸的脱羰作用在D，L-哌酸合成多羟基吲哚并核苷中的应用

  摘要：

  双环α-叔羧酰胺酸11的脱羰基导致酰胺12，轻松转化为吲哚并立生物碱8,8a-反式-8-羟基吲哚并立胺14。同样，对α-取代的胡椒酸衍生物5进行相同的处理，得到不饱和酯6，该不饱和酯6容易转化为δ-可卡因9或14。酰基衍生物22的热裂解产生了已转化为（±）-swainsonine 26的烯酰胺24。

  DOI：

  10.1016/s0040-4020(98)00689-9
• 作为产物：
  描述：

  六氢吡啶-alpha-羧酸 在 sodium hydroxide 、 硫酸 、 lithium diisopropyl amide 作用下， 以 乙醚 为溶剂， 反应 25.67h， 生成 tert-Butyl N-(benzyloxycarbonyl)-2(RS)-allylpipecolate
  参考文献：
  名称：

  Design, synthesis, and x-ray crystallographic analysis of two novel spirolactam systems as .beta.-turn mimics

  摘要：

  Two novel 5.4-spirolactam systems have been developed as beta-turn mimics. The (R)-5.4-spirolactam system of 4 was designed to mimic the type-II beta-turn, and the (S)-5.4-spirolactam system of 5 was designed to mimic the type-II' beta-turn. The 5.4-spirolactam dipeptide mimic 11 was synthesized in racemic form from pipecolic acid. This intermediate was then converted to the diastereoisomeric mixture of peptidomimetics 4 and 5, which were separated by fractional recrystallization. X-ray crystallographic analysis of 4 and 5 indicated that both of these compounds adopted hydrogen-bonded beta-turn conformations. As predicted, the (R)-5.4-spirolactam system of 4 induced a type-II beta-turn while the (S)-5.4-spirolactam system of 5 induced a type-II' beta-turn. The backbone torsion angles of 4 and 5 were close to those of the classical type-II and-II' beta-turns, respectively. A computer-generated fit between nine atoms of the backbone of 4 and their counterparts in an ideal type-II beta-turn yielded an RMS fit of 0.218 angstrom. A similar comparison between 5 and an ideal type-II' beta-turn produced an RMS fit of 0.392 angstrom.

  DOI：

  10.1021/jo00056a018

文献信息

• DPPA-Promoted decarbonylation of a N-Cbz-(D,L)-Pipecolinic acid derivative: An easy entry to [4.5]spirolactams and [4.5]spirolactones. Total synthesis of (±)-δ-coniceine
  作者：M.J. Martín-López、F. Bermejo-González

  DOI：10.1016/s0040-4039(00)73161-3

  日期：1994.6

  The synthesis of 6-benzyloxycarbonyl-1-oxa-6-azaspiro[4.5]decane-2-one 7a and 6-benzyloxycarbonyl-1,6-diazaspiro[4.5]decane-2-one 7b from (D,L)-pipecolinic acid is described. The extremely clean decarbonylation of the alpha-substituted amino acid 9d promoted by diphenylphosphorazidate (DPPA) is the key step of our strategy. The total synthesis of (+/-)-delta-coniceine (16) from the enamine ester 10a has been successfully achieved.